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NHTSA DATA · 2000–2026 MODEL YEARS
Toyota Corolla engine noise: what owners report
6,252 complaints to NHTSA, sorted: where the trouble is, which sounds owners describe, at what mileage, and what the manufacturer told its dealers. Then check your own Corolla by sound, free.
The Toyota Corolla has 6,252 owner complaints on file with NHTSA for the 2000–2026 model years. In 7% of them (461) the engine or the transmission is named. The system named most often is engine (261 complaints). Owners most often describe humming (60), rattling (29) and grinding (27). The median mileage on an engine or transmission complaint is 70,000 miles. NHTSA lists 145 manufacturer service bulletins that touch the engine or the transmission and 2 engine or transmission recall campaigns (of 42 in total). These are counts of unverified consumer reports, not failure rates.
NHTSA data through October 2026. Counted by PulsCar, updated 2026-11-09.
7%
of complaints name the engine or the transmission (461)
6,252
owner complaints to NHTSA, 2000–2026
70,000
median miles when an engine or transmission complaint is filed
145
service bulletins on engine or transmission
2
engine or transmission recalls (of 42)
Where owners say the problem is
Systems named in the complaints. One complaint can name several.
Engine
261
Transmission and drivetrain
191
Electrical system
133
Steering
127
Speed control
111
Brakes
108
The sounds they describe
How often each word appears in the written complaints. The bigger the bubble, the more owners used it.
Humming60
Rattling29
Grinding27
Knocking26
Ticking14
Clunking14
Whining8
Squealing5
Also written about: stalling (122) and misfiring (13).
What each sound points to
Among the complaints that use a word, how many name each system. This is how owners connect a sound to a part, not a diagnosis.
enginetransmissionbrakessteeringsuspensionelectrical system
“hum” 60
2%
2%
3%
7%
0%
2%
“rattle” 29
45%
10%
0%
10%
10%
14%
“grind” 27
15%
19%
56%
11%
4%
0%
“knock” 26
38%
15%
19%
15%
15%
8%
Hover a cell. Each row: the complaints that use that word, and the systems the same owners name.
Complaints by model year
Last 15 model years. Older cars had more time to collect complaints: read it as a map, not a ranking.
’12
’13
’14
’15
’16
’17
’18
’19
’20
’21
’22
’23
’24
’25
’26
2012 model year: 397 complaints (the most)
At what mileage
Engine and transmission complaints, by the mileage on the car when it was filed.
33%
35%
21%
11%
Under 50,000 miles · 33%50,000 to 100,000 miles · 35%100,000 to 150,000 miles · 21%Over 150,000 miles · 11%
195 engine and transmission complaints state a mileage. Median: 70,000 miles.
Official records
Manufacturer service bulletins and recall campaigns on file with NHTSA. Tap a line to read it.
SERVICE BULLETINS · WHAT TOYOTA TOLD DEALERS
145of 755 on engine or transmission, 2015–2026
Engine · 80Powertrain · 22Engine and cooling · 22Automatic transmission · 9Cooling system · 8
This condition will usually go away when the engines Revolutions Per Minute (RPM) are above idle This condition is typically found on vehicles in warm climates/weather No Diagnostic Trouble Codes…
Bulletin T-SB-0059-25 · 2025-09-09
This condition will usually go away when the engine Revolutions Per Minute (RPM) are above idle This condition is typically found on vehicles in warm climates/weather No Diagnostic Trouble Codes…
Bulletin T-SB-0088-23 Rev2 · 2024-08-08
This condition will usually go away when the engine Revolutions Per Minute (RPM) are above idle This condition is typically found on vehicles in warm climates/weather No Diagnostic Trouble Codes…
Bulletin TSB008823 · 2023-12-26
Follow the Repair Procedure in this bulletin to address this condition.
Bulletin T-SB-0106-20 Rev · 2022-12-19
A service bulletin is a manufacturer’s instruction to dealers. It is not a recall and not a finding about any particular car.
RECALLS ON THE ENGINE OR TRANSMISSION
2of 42 recall campaigns
The pump impeller blades within the torque converter may detach, especially when driven under high load, potentially causing a vehicle stall.
Campaign 18V901000
The engine control module (ecm) for the subject models equipped with the 1zz-fe engine and two-wheel drive may have been improperly manufactured there is a possibility that a crack may develop at certain solder points or on…
Campaign 10V384000
Check any VIN for open recalls free at nhtsa.gov/recalls.
In NHTSA complaints about the Toyota Corolla, owners most often describe humming (60 complaints), rattling (29 complaints) and grinding (27 complaints). These are word counts in written complaints, not confirmed faults, and one complaint can use several words.
At what mileage do Toyota Corolla engine and transmission complaints appear?
Of 195 Toyota Corolla engine and transmission complaints that state a mileage, 35% were filed between 50,000 and 100,000 miles, and the median is 70,000 miles.
Has Toyota issued service bulletins or recalls for the Corolla engine or transmission?
According to NHTSA, 145 service bulletins touch the engine or the transmission (2015–2026) and 2 of its 42 recall campaigns concern the engine or the transmission. A service bulletin is an instruction from the manufacturer to its dealers; it is not a recall and not a finding about any particular car. Check any VIN for open recalls free at nhtsa.gov/recalls.
Can a sound check diagnose my Corolla?
No. A sound check is not a diagnosis, because nobody has opened your engine. PulsCar’s free check analyses 30 seconds of audio and tells you what to ask a mechanic.
Check your Corolla by sound
Film the engine for 30 seconds, idling, hood open. Two independent AI engines analyse the sound and you see the result on screen: a health score, the systems the sound can speak about and what to ask a mechanic.
What this data can and cannot tell you. NHTSA complaints are unverified consumer reports. These are counts, not rates: we do not know how many Toyota Corolla cars were sold or driven, so a higher count does not mean a worse car. A sound check is not a diagnosis, nobody has opened your engine. Data: NHTSA public database (nhtsa.gov), counted by PulsCar.
Safety first. If the engine overheats, the oil light is on or the car loses power while driving, stop and call a mechanic.